journal article·2020-07-27

Artificial Trees for Artificial Photosynthesis: Construction of Dendrite-Structured α-Fe2O3/g-C3N4 Z-Scheme System for Efficient CO2 Reduction into Solar Fuels

Yan Shen, Qiutong Han, Jianqiang Hu, Wa Gao, Lu Wang, Liuqing Yang, Chao Gao, Qing Shen, Congping Wu, Xiaoyong Wang, Xin Zhou, Yong Zhou, Zhigang Zou

ACS Applied Energy Materials· Volume 3· Issue 7
Publisher page

Abstract

A direct all-solid-state Z-scheme heterojunction photocatalyst of a g-C3N4-coated tree-like α-Fe2O3 was rationally constructed toward CO2 conversion. The so-called artificial tree shows excellent performance and stability for CO production (17.8 μmol g–1 h–1), almost 3 times that of pristine g-C3N4. Density functional theory computations explain the intrinsic cause for the formation of the Z-scheme structure. The enhanced photocatalytic performance can be attributed to a synergistic effect of the following factors: (1) the combination of α-Fe2O3 with g-C3N4 helps to promote light harvesting and CO2 adsorption; (2) the hybridization effectively enhances the spatial separation of photogenerated electrons and holes, suppressing the undesirable recombination of charge carriers; (3) the dendritic structure of α-Fe2O3 provides ample active sites with considerable steps, edges, and kinks along the twigs, and meanwhile, the exposed (001) facet with high electron conduction facilitates photoelectrons' transportation to the interface. This work provides new insight into constructing Z-scheme photocatalysts for CO2 conversion.
Source: openalex_inverted_index · Quality: baseline

Research context

OpenAlex topics: Advanced Photocatalysis Techniques · Electrocatalysts for Energy Conversion · Copper-based nanomaterials and applications

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

College of Engineering and Applied Sciences, Nanjing University, Nanjing 210093, P. R. China

National Laboratory of Solid State Microstructures, Collaborative Innovation Center of Advanced Microstructures, School of Physics, Nanjing University, Nanjing 210093, P. R. China

Institute of Advanced Materials, Jiangxi Normal University, Nanchang 330022, P. R. China

School of Chemistry & Materials Science, University of Science and Technology of China, Hefei 230026, P. R. China

Faculty of Informatics and Engineering, the University of Electro-Communications, Tokyo 182-8585, Japan

College of Environment and Chemical Engineering, Dalian University, Dalian, Liaoning 116622, P. R. China

Key Laboratory for Nano Technology, Nanjing University, Nanjing 210093, P. R. China

Kunshan Sunlaite New Energy Co., Ltd, Kunshan Innovation Institute of Nanjing University, Kunshan, Jiangsu 215347, P. R. China

School of Science and Engineering, The Chinese University of Hong Kong, Shenzhen, Guangdong 518172, P. R. China

Funding

Ministry of Education of the People's Republic of China · Ministry of Science and Technology of the People's Republic of China · Natural Science Foundation of Jiangsu Province · National Natural Science Foundation of China · Henan Province

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